Arch Linux configuration management

It turns out that tracking tweaks to the system, Arch Linux in my case, is a
common concern. And it has already been solved by
aconfmgr. This is a shell script,
which calculates what has changed in the system: installed or removed packages;
added, removed or changed files.

I believe this is a good opportunity to ease management of my laptop. So there I
have it: arch-config. It will
naturally complement my earlier attempt to manage
dotfiles.